Click the plus sign at the bottom of the panel to open the Add Documents dialog box. Navigate to your chapter documents and select them all at once (select the first one, press Shift, then select the last one), then click Open. Now the documents will all be shown in your Book file. Save the Book file by clicking the Save the Book icon at the bottom of the panel (second from the left). Here is what our Book Design Made Simple panel looks like:
To create a running list—a list that is interrupted by other paragraphs or that spans multiple stories or documents—create a paragraph style and apply the style to paragraphs that you want to be part of the list. For example, to create a running list of the tables in your document, create a paragraph style called Tables, make a defined list part of the style, and then apply the Tables paragraph style to all paragraphs you want in your Table list.
I want to point out that if this document is a fixed set of standards but will be amended in later editions, then autonumbers will increment, which is a bad idea. In legal documents, numbers are usually static, and deletions are struck-through, not deleted, to preserve the original numbering, so that older and newer editions can be compared number-by-number. Inserted and appended content would need to be manually numbered. You may want to create the first edition with autonumbering, then convert the numbered list numbers to text, to avoid unwanted renumbering in future editions.
You have two choices when faced with the task of numbering headings in a Word document. You can enter the numbers manually and hope nothing changes — lots of luck with that one. Or you can opt for the more efficient solution and create and apply a numbered style. Unfortunately, that can get you into even more trouble, if you don't know what you're doing. To avoid surprises, follow these 10 steps to add a numbering scheme to a style.

You will occasionally want to place an unnumbered paragraph in the middle of a sequence, but the moment you hit Enter, another paragraph number pops up. To fix this, toggle paragraph numbering off by pressing the paragraph numbering button you used for the previous paragraph. (If you use the button’s drop-down, choose None as the numbering scheme.) Unfortunately, the paragraph settings won’t revert to Normal here; it’ll usually have the paragraph indented 0.25. Use the keyboard shortcut CTRL+Q to strip paragraph settings out, then revise the formatting as you wish.

CK Note: Word 2007 - 2013 interface has an different automatic numbering scheme which I have been told is much less subject to corruption. Microsoft Word 2010 Bible by Herb Tyson, MVP. However numbering is still very imperfect in these later versions. I still recommend following Shauna Kelly's step-by-step instructions (see above) if setting up numbering in a template or in a document likely to be heavily edited. If you start without doing this and end up with "spaghetti numbering," fixing it will be a very large chore!